Abstract

This Letter reports the optical properties of CdTe/MgCdTe double heterostructures grown by molecular beam epitaxy. Low-temperature photoluminescence shows strong band-to-band emission and very weak defect related peaks, indicating low defect densities. The measured Shockley-Read-Hall lifetimes range from 57 to 86 ns at room temperature for samples grown under different conditions. The material radiative recombination coefficient B in the recombination rate defined as R=AΔn+(1-γ)BΔn2+CΔn3 [Wang et al., Phys. Status Solidi B 244, 2740 (2007)] is evaluated to be 4.3 ± 0.5 × 10-9 cm3·s-1 with a photon recycling factor γ of 0.85 calculated based on the geometric structure of the samples.

Original languageEnglish (US)
Article number040601
JournalJournal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures
Volume32
Issue number4
DOIs
StatePublished - Jul 2014

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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